Kotlin Program to Sort ArrayList of Custom Objects By Property

Example: Sort ArrayList of Custom Objects By Property

 import java.util.* fun main(args: Array<String>) { val list = ArrayList<CustomObject>() list.add(CustomObject("Z")) list.add(CustomObject("A")) list.add(CustomObject("B")) list.add(CustomObject("X")) list.add(CustomObject("Aa")) var sortedList = list.sortedWith(compareBy({ it.customProperty })) for (obj in sortedList) { println(obj.customProperty) } } public class CustomObject(val customProperty: String) { }

When you run the program, the output will be:

 A Aa B X Z

In the above program, we've defined a CustomObject class with a String property, customProperty.

In the main() method, we've created an array list of custom objects list, initialized with 5 objects.

For sorting the list with the property, we use list's sortedWith() method. The sortedWith() method takes a comparator compareBy that compares customProperty of each object and sorts it.

The sorted list is then stored in the variable sortedList.

Here's the equivalent Java code: Java program to sort an ArrayList of custom objects by property.